package com.example.config;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 */
public class LoginHandlerInterceptor implements HandlerInterceptor {
    //是否放行
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //登录成功, 应该有用户的session
        Object loginUser = request.getSession().getAttribute("loginUser");
        if(loginUser == null){
            //没有登录
            request.setAttribute("msg", "没有权限, 重新登录");
            request.getRequestDispatcher("/index.html").forward(request, response);
            return false;
        }else{
            return true;
        }
    }


}
